package com.api.test;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;

/**
 * @description:
 * @author: endure
 * @create: 2020-06-04 10:14
 **/
public class AttemptLocking {
    private ReentrantLock lock = new ReentrantLock();

    public void untimed() {
        boolean captured = lock.tryLock();
        try {
            System.out.println("tryLock " + captured);
        } finally {
            if (captured) {
                lock.unlock();
            }
        }
    }

    public void timed(){
        boolean captured = false;
        try {
            captured = lock.tryLock(2, TimeUnit.SECONDS);
        }catch (Exception e){
            throw new RuntimeException(e);
        }
        try {
            System.out.println("tryLock(2, TimeUnit.SECONDS)" +captured);
        }finally {
            if(captured){
                lock.unlock();
            }
        }
    }

    public static void main(String[] args) {
        final AttemptLocking al = new AttemptLocking();
        al.untimed();
        al.timed();
        new Thread(){
            {setDaemon(true);}
            public void run(){
                al.lock.lock();
                System.out.println("acquired");
            }
        }.start();
        Thread.yield();
        al.untimed();
        al.timed();
    }
}
